HARDWARE
28
CIO Remote CAN Digital I/O Module
GEK-106465A
INTERNAL STATE
V 52/a
V 52/b
SUPERVISION
52 open
ON
ON
OK
52 closed
ON
OFF
OK
TRIP
OFF
OFF
Ok if t < 0.5 s
TRIP with 52 open
OFF
ON
OK
Status of Involved Elements
Inputs to F650
Decision
CIRCUIT
STATUS
OUTPUT
STATUS
(F35-F36)
BREAKER
STATUS
OPERAND
CONTACT
INPUT_00_10
(Va_COIL2)
V 52/a (15-16)
OPERAND
CONTACT
INPUT_00_11
(Vb_COIL2)
V 52/b (17-18)
OPERAND
CONTACT
INPUT_00_15
(SUP_COIL2)
Healthy Open
52
closed
ON
OFF
ON
Healthy Open
52
open
ON
ON
ON
Healthy Closed
52
closed
OFF
OFF
ON (if t < 500 ms)
OFF (if t > 500 ms)
Healthy Closed
52
open
OFF
ON
ON (if t < 500 ms)
OFF (if t > 500 ms)
Defective
Open
52 closed
OFF
OFF
OFF (500 ms delay)
Defective
Open
52 open
OFF
OFF
OFF (500 ms delay)
Defective
Closed
52 closed
OFF
OFF
OFF (500 ms delay)
Defective
Closed
52 open
OFF
OFF
OFF (500 ms delay)
There is a possibility to monitor the trip circuit continuity not only via its auxiliary contact 52/a, but also with auxiliary
contact 52/b. This avoids the need to install a resistance in parallel with auxiliary 52/a. The correct connection is
shown on FIGURE 3-12.
The circuit works in a similar way to the one described in the previous section, but it uses both supervision inputs 15-
16 and 17-18.
The advantage in this case is that circuit supervision with 52 open is more complete, as input V 52/b is used through
contact 52/b, (that is closed when the breaker is open).
We must point out that in this scheme, the tripping contact, shown in the example as the CIO trip relay, can be the
one in the relay (terminals 35 and 36), or be provided by another protection or by the parallel of several protections.
This provides high flexibility in the use of this circuit.
The battery voltage can also be monitored, by using one of the standard digital inputs.
